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davidfrantz / force

Framework for Operational Radiometric Correction for Environmental monitoring
GNU General Public License v3.0
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MODIS to be decommissioned; is there an alternative? #260

Open vincentschut opened 1 year ago

vincentschut commented 1 year ago

Hi,

Both Terra and Aqua have left their consellation orbits, and I expect them to be decommissioned in the near future (somewhere next year?), leaving FORCE without a source of atmospheric parameter data for landsat atmospheric correction. Are there any plans to find and implement an alternative? Perhaps Sentinel3?

davidfrantz commented 1 year ago

Hi @vincentschut,

I was dissatisfied with the MODIS-based download for quite some time now because the downloading of products is often fairly unstable.

The good thing is that the newer OLI sensors are much less affected by water vapor than the previous ones. As such, using the long-term climatology is actually quite robust for new data. Please see this paper where we evaluated this: https://www.mdpi.com/2072-4292/11/3/257 Only the 2nd SWIR is still a bit influenced, and not every climate zone and season is affected in the same way.

But nevertheless, yes, a substitute would be in order. I was thinking about the CAMS forecast data. But unfortunately, I never had the time to really look into this.

I am gonna label this issue as help wanted in case anybody wants to chip in.

Cheers, David

Florian-Katerndahl commented 1 year ago

Dear all, a while back I talked with @davidfrantz and at least the download side of things is done (and should work without bugs) and can be currently be found here: https://github.com/Florian-Katerndahl/shop4AtmosData. As I now want/have to focus on my bachelor thesis and other work, David took over the implementation of actually using the data (if I understood you correct).

Cheers, Florian